Work
The product of force and distance.
Joule
The SI unit of work.
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Work
The product of force and distance.
Joule
The SI unit of work.
Power
The rate of doing work.
Watt
The SI unit of power.
Horse Power
Equivalent to 746 watts.
Machine
A device that changes a force.
Input Force
The force you exert on a machine.
Work Input
The work done by the input force acting through the input distance.
Output Force
The force exerted by the machine through the output distance.
Work Output
The output force manipulated by the output distance.
Mechanical Advantage
The number of times that the machine increases an input force.
Actual Mechanical Advantage
The ratio of the output force to the input force.
Ideal Mechanical Advantage
Mechanical advantage in the absence of friction.
Efficiency
Percentage of the work input that becomes an output.
Lever
A rigid bar that is free to move around at a fixed point.
Fulcrum
The fixed point the lever rotates around.
Input Arm
The distance between the input force and the fulcrum.
Output Arm
The distance between the output force and the fulcrum.
Wheel and Axle
A simple machine that consists of two disks or cylinders, each with a different radius.
Inclined Plane
A slanted surface along which an object moves to different elevations.